On a Paris stage in 1673, Molière collapsed while performing in the last play he wrote, “The Imaginary Invalid,” a farce lampooning the medical establishment of 17th-century France. Hours later, he died. Geoff Hoyle, who will perform the same role in Inverness this weekend and next, hopes the same fate does not befall him. He sees many parallels between medical purveyors in 17th-century France and the wellness gurus of today, both peddling miracle cures more…